// Even if multithreading is already disabled, if we are executing within a
  // pass-manager,  disableMultithreading throws assertion fail. Below if
  // statement ensures that disableMultithreading will not be executed if
  // multithreading is already disabled.
  if (pm.getContext()->isMultithreadingEnabled()) {
    pm.getContext()->disableMultithreading();
  }

  // The configuration uses the default parameter values for